Abstract
In today's road maintenance, the traffic distribution in short periods of time such as in the morning or evening peak is necessary to determine. The aim of this study is to propose the link performance function (BPR function) that focuses on such short lengths of time and the improvement of the accuracy of the BPR function that considers the vertical inclination on the road. The traffic condition was measured in the morning and evening. The relationship of actual traffic with the vertical inclination on the road was clarified by using the probe car. In addition, the root mean square rate fell by 69% in comparison with the previous estimation method by using the BPR function that considered the vertical inclination on the road, and the accuracy of reproducibility.
